PHP simple traversal rename

$path = './fzlhead/';

function get_filetree_scandir($path){

$result = array();

$temp = array();

if (!is_dir ($path)||!is_readable($path)) return null; //Check directory validity

$allfiles = scandir($path); //Get all files and folders in the directory

foreach ($allfiles as $filename) { //Traverse the files and folders in the directory

if (in_array($filename,array('.','..'))) continue; //Ignore. and..

$fullname = $path.'/'.$filename; //Get the full file path

if (is_dir($fullname)) { //If it is a directory, continue the recursion

$result[$filename] = get_filetree_scandir($fullname); //Recursion starts

}

else {

$temp[] = $filename; //If it is a file, store it in the array

$uniqid = uniqid('apoo_');

$ext = pathinfo( $filename, PATHINFO_EXTENSION);

rename($fullname,$path.'/'.$uniqid.'.'.$ext);

}

}

foreach ($temp as $tmp) { // Store the contents of the temporary array into the array that saves the results

$result[] = $tmp; //This allows the folder to be arranged in the front and the file in the back

}

return $result;

}

print_r( get_filetree_scandir($path));

?>